Glasses and fixing device

ABSTRACT

Spectacles comprise a bridge connecting two lenses, and side pieces mounted on the lenses for carrying spectacle bows, the lenses being connected to the side pieces and to the bridge by an attachment which comprises a U-shaped wire loop which is inserted into a bore in a lens and is secured by a plug in such manner that the wire is urged into positive engagement with axially extending grooves in a wall of the bore.

BACKGROUND OF THE INVENTION

The invention relates to spectacles and an attachment means.

Lenses and parts of a mount of spectacles are usually connected togetherby means of screws, threaded sleeves or a threaded pin with a nut. Theseare usually safeguarded against rotation by being secured in two bores,or by a pin in a notch at the periphery of a lens. A much applied methodis that of inserting a wire bent to U-shape into oblong holes in thelens.

EP 0 561 763 A1 describes a lens holder for spectacles, comprising pairsof retaining pins which each engage in a respective bore in a spectaclelens and are supported by a mount portion of the spectacles, theretaining pins consisting of the free limbs of a U-shaped wire bracketwhich has a portion of its cross-piece that connects the two limbstogether attached to the mount portion.

EP 1 024 390 A1 describes a mount for bored spectacles, comprising abridge connecting two lenses, and brackets which each have a pin-shapedattachment element, the pin-shaped attachment elements each having awing-shaped attachment region, and the spectacle lenses havingcorresponding slot-like (bead-shaped) notches disposed at a distancedfrom the extreme edge of the lens for stress-free, rotation-proof, andform-fitting engagement with the widened attachment regions.

Most of the attachment means known in the prior art require relativelydifficult machining of the lenses. Furthermore, they are onlyinsufficiently secure, for example by wire loops inserted in oblongholes.

SUMMARY OF THE INVENTION

An object of the invention to provide spectacles having a verysmall-sized attachment means which will nevertheless ensure a secureattachment of the lenses.

The object is achieved in accordance with the invention by at least oneattachment means having a U-shaped wire loop which is inserted in a borein the lens and is secured by a plug in such manner that the wire isurged into positive engagement with axially extending grooves in thewall of the bore.

The plug is preferably a plug of a synthetic material which additionallymay be secured with the aid of an adhesive, if necessary.

The adhesive used is either a radiation-activated adhesive, anepoxy-reins based adhesive, a hot-melt-type adhesive, or a thermoplasticsynthetic material.

A further object of the invention is to provide an attachment means of avery small size, which nevertheless ensures a secure attachment of thelenses.

The object is achieved in accordance with the invention by at least oneattachment means having a U-shaped wire loop which is inserted in a borein the lens and is secured by a plug in such manner that the wire isurged into positive engagement with axially extending grooves in thewall of the bore.

The plug is preferably a plug of a synthetic material which additionallymay be secured with the aid of an adhesive, if necessary.

The adhesive used is either a radiation-activated adhesive, anepoxy-reins based adhesive, a hot-melt type-adhesive, or a thermoplasticsynthetic material.

BRIEF DESCRIPTION OF THE DRAWINGS

These and other objects, features and advantages of the presentinvention will become more readily apparent from the following detaileddescription of currently preferred configurations thereof when taken inconjunction with the accompanying drawings wherein:

FIGS. 1 a and 1 b are side and cross-sectional views showing a bore withgrooves for partially receiving a looped wire in positive engagement;and

FIGS. 2 a and 2 b are side and cross-sectional views showing a bore withgrooves for completely receiving the looped wire in positive engagement.

DETAILED DESCRIPTION OF THE DRAWINGS

Attachment elements 1 are designed so that a loop 2 of thin wire isfitted into a specifically shaped bore close to the edge, and is securedagainst sliding out and is permanently fixed in a predetermined positionby the insertion of a plug 3.

The plug is preferably a plug of a synthetic material which additionallymay be secured with the aid of an adhesive, if necessary.

The adhesive used is either a radiation-activated adhesive, anepoxy-reins based adhesive, a hot-melt-type adhesive, or a thermoplasticsynthetic material.

Although the present invention has been illustrated and described withrespect to exemplary embodiment thereof, it should be understood bythose skilled in the art that the foregoing and various other changes,omission and additions may be made therein and thereto, withoutdeparting from the spirit and scope of the present invention. Therefore,the present invention should not be understood as limited to thespecific embodiment set out above but to include all possibleembodiments which can be embodied within a scope encompassed andequivalent thereof with respect to the feature set out in the appendedclaims.

1. Spectacles comprising a bridge connecting two lenses, and side piecesmounted on the lenses for carrying spectacle bows, the lenses beingconnected to the side pieces and to the bridge by an attachment means;wherein at least one attachment means comprises a U-shaped wire loopwhich is inserted into a bore in a lens and is secured by a plug in suchmanner that the wire is urged into positive engagement with axiallyextending grooves in a wall of the bore.
 2. Spectacles according toclaim 1, wherein the plug is a plug of a synthetic material. 3.Spectacles according to claim 2, wherein the plug is secured by anadhesive.
 4. Spectacles according to claim 3, wherein the adhesive is aradiation-activated adhesive, an epoxy-resin based adhesive, ahot-melt-type adhesive, or a thermoplastic synthetic material. 5.Spectacles according to claim 1, wherein the plug is secured by anadhesive.
 6. Spectacles according to claim 5, wherein the adhesive is aradiation-activated adhesive, an epoxy-resin based adhesive, ahot-melt-type adhesive, or a thermoplastic synthetic material. 7.Attachment means for spectacles, with which spectacle lenses areconnected to spectacles side pieces and to a spectacles bridge, whereinat least one attachment means comprises a U-shaped wire loop which isinserted into a bore in a lens and is secured by a plug in such a mannerthat the wire is urged into positive engagement with axially extendinggrooves in a wall of the bore.
 8. Spectacles according to claim 7,wherein the plug is a plug of a synthetic material.
 9. Spectaclesaccording to claim 8, wherein the plug is secured by an adhesive. 10.Spectacles according to claim 7, wherein the plug is secured by anadhesive.
 11. Spectacles according to claim 10, wherein the adhesive isa radiation-activated adhesive, an epoxy-resin based adhesive, ahot-melt-type adhesive, or a thermoplastic synthetic material.